The Stereochemistry of the Imidazolidine Ring

doi:10.1063/1.1748234

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The Stereochemistry of the Imidazolidine Ring

E. Fischer

Apr 1, 1951

Citations

Journal

Journal of Chemical Physics

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Key Takeaway

Key Takeaway: The imidazolidine derivatives in p-xylene solution are mixtures of geometrical isomers in thermal equilibrium, with the energy difference between the two isomers being about 1.6 kcal/mole.

Abstract

The electric moments of several imidazolidine derivatives in p‐xylene solution have been measured at various temperatures. It is suggested that the substances are mixtures of geometrical isomers which are in thermal equilibrium, the isomerism being due to the pyramidal arrangement of the valencies of the tervalent nitrogen.From the temperature dependence of the moments, the energy difference between the two postulated isomers is calculated to be about 1.6 kcal/mole.

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